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<title>[50684] branches/5.7/tests/phpunit/tests/media.php: Media: Do not lazy load hidden images or embeds.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/50684">50684</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/50684","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>peterwilsoncc</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2021-04-07 01:50:59 +0000 (Wed, 07 Apr 2021)</dd>
</dl>
<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Media: Do not lazy load hidden images or embeds.
Improve the check for sourceless or dimensionless media when determining if the lazy loading attribute should be added to iframes and images. Never include the lazy loading attribute on embeds of WordPress posts as the iframe is initially hidden.
Including `loading="lazy"` on initially hidden iframes and images can prevent the media from loading in some browsers.
Props adamsilverstein, fabianpimminger, flixos90, johnbillion, jonkastonka, joyously, peterwilsoncc, SergeyBiryukov, SirStuey, swissspidy.
Merges <a href="https://core.trac.wordpress.org/changeset/50682">[50682]</a>, <a href="https://core.trac.wordpress.org/changeset/50683">[50683]</a> to the 5.7 branch.
Fixes <a href="https://core.trac.wordpress.org/ticket/52768">#52768</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#branches57srcwpincludesmediaphp">branches/5.7/src/wp-includes/media.php</a></li>
<li><a href="#branches57testsphpunittestsmediaphp">branches/5.7/tests/phpunit/tests/media.php</a></li>
</ul>
<h3>Property Changed</h3>
<ul>
<li><a href="#branches57">branches/5.7/</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<span class="cx" style="display: block; padding: 0 10px">Index: branches/5.7
</span><span class="cx" style="display: block; padding: 0 10px">===================================================================
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">--- branches/5.7 2021-04-07 01:32:21 UTC (rev 50683)
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+++ branches/5.7 2021-04-07 01:50:59 UTC (rev 50684)
</ins><a id="branches57"></a>
<div class="propset"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Property changes: branches/5.7</h4>
<pre class="diff"><span>
</span></pre></div>
<a id="svnmergeinfo"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: svn:mergeinfo</h4></div>
<span class="cx" style="display: block; padding: 0 10px"> /branches/4.9:43557,43622
</span><span class="cx" style="display: block; padding: 0 10px"> /branches/5.0:43681-43682,43684-43688,43719-43720,43723,43726-43727,43729-43731,43734-43744,43747,43751-43754,43758,43760-43765,43767-43770,43772,43774-43781,43783,43785,43790-43806,43808-43821,43825,43828,43830-43834,43836-43843,43846-43863,43867-43889,43891-43894,43897-43905,43908-43909,43911-43929,43931-43942,43946-43947,43949-43956,43959-43964,43967-43969,43988,43994,44014,44017,44047,44183,44185,44187-44206,44208-44213,44231-44232,44235,44248,44284,44287-44288
</span><span class="cx" style="display: block; padding: 0 10px"> /branches/5.5:49373-49379,49381
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-/trunk:50428-50430,50432,50435-50436,50439,50441-50445,50460-50461,50465-50466,50471,50475,50478-50479,50483,50485-50487,50493,50495,50499,50501,50507,50510,50518,50523,50525,50534-50535,50545,50551-50552,50566-50569,50571,50575,50577,50579,50585-50586,50590-50598,50628,50634,50653-50654,50659,50663,50667,50669-50670
</del><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+/trunk:50428-50430,50432,50435-50436,50439,50441-50445,50460-50461,50465-50466,50471,50475,50478-50479,50483,50485-50487,50493,50495,50499,50501,50507,50510,50518,50523,50525,50534-50535,50545,50551-50552,50566-50569,50571,50575,50577,50579,50585-50586,50590-50598,50628,50634,50653-50654,50659,50663,50667,50669-50670,50682-50683
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="branches57srcwpincludesmediaphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.7/src/wp-includes/media.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.7/src/wp-includes/media.php 2021-04-07 01:32:21 UTC (rev 50683)
+++ branches/5.7/src/wp-includes/media.php 2021-04-07 01:50:59 UTC (rev 50684)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1869,6 +1869,11 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @return string Converted `img` tag with `loading` attribute added.
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> function wp_img_tag_add_loading_attr( $image, $context ) {
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ // Images should have source and dimension attributes for the `loading` attribute to be added.
+ if ( false === strpos( $image, ' src="' ) || false === strpos( $image, ' width="' ) || false === strpos( $image, ' height="' ) ) {
+ return $image;
+ }
+
</ins><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="cx" style="display: block; padding: 0 10px"> * Filters the `loading` attribute value to add to an image. Default `lazy`.
</span><span class="cx" style="display: block; padding: 0 10px"> *
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1889,11 +1894,6 @@
</span><span class="cx" style="display: block; padding: 0 10px"> $value = 'lazy';
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- // Images should have source and dimension attributes for the `loading` attribute to be added.
- if ( false === strpos( $image, ' src="' ) || false === strpos( $image, ' width="' ) || false === strpos( $image, ' height="' ) ) {
- return $image;
- }
-
</del><span class="cx" style="display: block; padding: 0 10px"> return str_replace( '<img', '<img loading="' . esc_attr( $value ) . '"', $image );
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1989,6 +1989,17 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @return string Converted `iframe` tag with `loading` attribute added.
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> function wp_iframe_tag_add_loading_attr( $iframe, $context ) {
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ // Iframes with fallback content (see `wp_filter_oembed_result()`) should not be lazy-loaded because they are
+ // visually hidden initially.
+ if ( false !== strpos( $iframe, ' data-secret="' ) ) {
+ return $iframe;
+ }
+
+ // Iframes should have source and dimension attributes for the `loading` attribute to be added.
+ if ( false === strpos( $iframe, ' src="' ) || false === strpos( $iframe, ' width="' ) || false === strpos( $iframe, ' height="' ) ) {
+ return $iframe;
+ }
+
</ins><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="cx" style="display: block; padding: 0 10px"> * Filters the `loading` attribute value to add to an iframe. Default `lazy`.
</span><span class="cx" style="display: block; padding: 0 10px"> *
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2009,11 +2020,6 @@
</span><span class="cx" style="display: block; padding: 0 10px"> $value = 'lazy';
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- // Iframes should have source and dimension attributes for the `loading` attribute to be added.
- if ( false === strpos( $iframe, ' src="' ) || false === strpos( $iframe, ' width="' ) || false === strpos( $iframe, ' height="' ) ) {
- return $iframe;
- }
-
</del><span class="cx" style="display: block; padding: 0 10px"> return str_replace( '<iframe', '<iframe loading="' . esc_attr( $value ) . '"', $iframe );
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span></span></pre></div>
<a id="branches57testsphpunittestsmediaphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.7/tests/phpunit/tests/media.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.7/tests/phpunit/tests/media.php 2021-04-07 01:32:21 UTC (rev 50683)
+++ branches/5.7/tests/phpunit/tests/media.php 2021-04-07 01:50:59 UTC (rev 50684)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2935,11 +2935,24 @@
</span><span class="cx" style="display: block; padding: 0 10px"> function test_wp_iframe_tag_add_loading_attr_opt_out() {
</span><span class="cx" style="display: block; padding: 0 10px"> $iframe = '<iframe src="https://www.example.com" width="640" height="360"></iframe>';
</span><span class="cx" style="display: block; padding: 0 10px"> add_filter( 'wp_iframe_tag_add_loading_attr', '__return_false' );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $iframe = wp_iframe_tag_add_loading_attr( $iframe, 'test' );
</ins><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> $this->assertNotContains( ' loading=', $iframe );
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * @ticket 52768
+ */
+ function test_wp_iframe_tag_add_loading_attr_skip_wp_embed() {
+ $iframe = '<iframe src="https://www.example.com" width="640" height="360"></iframe>';
+ $fallback = '<blockquote>Fallback content.</blockquote>';
+ $iframe = wp_filter_oembed_result( $fallback . $iframe, (object) array( 'type' => 'rich' ), 'https://www.example.com' );
+ $iframe = wp_iframe_tag_add_loading_attr( $iframe, 'test' );
+
+ $this->assertNotContains( ' loading=', $iframe );
+ }
+
+ /**
</ins><span class="cx" style="display: block; padding: 0 10px"> * @ticket 44427
</span><span class="cx" style="display: block; padding: 0 10px"> * @ticket 50425
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span></span></pre>
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